Drinking cup that rotatably attaches to a plastic bottle for closure and protection

Abstract

A drinking cup with a tubular protrusion molded to the bottom and having an internal thread that allows it to be rotatably attached to and detached from a bottle with a small cylindrical neck. The internal thread cooperates with an external thread that is molded on the small cylindrical neck of the bottle so that the drinking cup can function as a cap to close and seal the bottle when it is inverted and placed over the neck of the bottle.

1 . A drinking cup for use with a bottle having a cylindrical neck with an external thread thereon and comprising:
 a top opening;   a top rim that defines said top opening;   a base;   a tubular protrusion extending from said base and having an inner surface with an internal thread thereon; and   wherein said internal thread cooperates with said external thread of said bottle so that said drinking cup can be rotatably attached to and detached from said cylindrical neck to open and close said bottle, respectively.   
     
     
         2 . The drinking cup according to  claim 1 , further comprising a bead that radially extends throughout said top rim. 
     
     
         3 . A drinking cup for use with a bottle having a cylindrical neck with an external thread thereon and comprising:
 a top opening;   a top rim that defines said top opening;   a sidewall with a dome-like shape;   a stem extending downward from said sidewall and having an inner surface with an internal thread thereon;   wherein said internal thread cooperates with said external thread of said bottle so that said drinking cup can be rotatably attached to and detached from said cylindrical neck to open and close said bottle, respectively; and   a base attached to said stem for stability and support when said drinking cup rests on a flat surface.   
     
     
         4 . The drinking cup according to  claim 3 , further comprising a bead that radially extends throughout said top rim.